CMG, one of my forum and chat buddies (and he of one of the bowling blogs in my blogroll), has recently launched a very comprehensive bowling score tracker application at bowlsk.com. He put it together out of frustration at the lack of features found on most bowling score tracker sites. What he has come up with is outstanding; not only will it show a line score for every game of a set, but it will also show your leaves (with pins still standing after spare attempts shown in red), and also has space for notes on stance (as a board number), target, and the board you actually hit, and even what ball you used for your attempt at a strike in the frame. You can take a look at the bowlers already registered on the site to see what I mean.
I do plan on using the site myself down the line, but I don’t feel I need the detail bowlsk.com offers at this point. However, I do feel the site deserves a link in the sidebar and I have added it. Last note: if you use the site, please consider donating; as the site grows in number of users, the site’s bandwidth needs will become greater, so donations will help pay for that.